UV Index in Mesa, United States

Last updated: July 2, 2025

In Mesa, United States, being aware of the UV Index is crucial for protecting your skin and overall health. Understanding UV levels helps you effectively prevent sunburn and long-term skin damage, allowing you to enjoy the sunshine safely. Known for its BSh climate, Mesa experiences high UV exposure, especially during peak hours between 10 AM and 3 PM, when UV Index values can soar as high as 11. Staying informed about these levels is essential for residents and visitors alike to make educated decisions about outdoor activities and sun protection.

Hourly UV Index in Mesa

The UV Index today charts an intriguing journey as the sun makes its ascent. Starting at a mild 1 at 7:00 AM, the UV levels steadily rise, reaching a moderate 3 by 8:00 AM. As the day progresses, the intensity peaks dramatically, hitting 10 at 11:00 AM and soaring to a maximum of 11 at noon and 1:00 PM—a clear signal for sun safety. After this zenith, the index gracefully declines, dipping to 7 by 3:00 PM, before slipping to 2 at 5:00 PM and settling back to a low 1 by evening. It's a vivid reminder of the sun’s power and the importance of taking precautions during those peak hours!

Average solar exposure data for the current time of the year. Actual values may vary and depend on many factors, such as cloud cover, vegetation cover, surface type, etc.
Time	UVI	Category	Time to Burn
07:00	1	low	45 min
08:00	3	moderate	30 min
09:00	5	moderate	30 min
10:00	8	very high	15 min
11:00	10	very high	15 min
12:00	11	extreme	10 min
13:00	11	extreme	10 min
14:00	10	very high	15 min
15:00	7	high	25 min
16:00	5	moderate	30 min
17:00	2	low	45 min
18:00	1	low	45 min
19:00	1	low	45 min

Monthly UV Index Trends in Mesa

As the year progresses, seasonal UV changes indicate a significant increase in UV exposure from January to May, reaching an extreme level of 11 by May and staying elevated throughout the summer months of June and July. The high-risk months for UV exposure are March through September, particularly April and May, which see very high to extreme UV Index values. During these peak months, the burn time reduces dramatically to just 10 minutes, necessitating strong sun protection measures. Visitors and residents are advised to limit sun exposure during these high UV periods, especially around midday, by wearing sunscreen, protective clothing, and hats, while seeking shade whenever possible. As the year comes to a close, UV levels drop back down to moderate levels in November and December, where precautions can be relaxed slightly.

Monthly Maximum UV Index for Mesa, United States

The monthly maximum UV Index (UVI) represents the highest UV radiation level recorded each month in Mesa. It measures the strength of ultraviolet radiation from the sun and helps assess the risk of sunburn and UV-related health issues.

Data source: Statistical UV Index data for Mesa, based on information from the Copernicus Climate Change Service.

UV Risk Categories

Extreme (11+): Avoid the sun, stay in shade.
Very High (8-10): Limit sun exposure.
High (6-7): Use SPF 30+ and protective clothing.
Moderate (3-5): Midday shade recommended.
Low (0-2): No protection needed.

Compare Mesa UV Index with Other United States Cities

The table above highlights how UV exposure in Mesa compares to other major locations across United States. This comparison helps travelers and residents better understand regional sun intensity and plan outdoor activities with sun safety in mind.

Mesa's solar exposure compared to other cities in United States. Generated using Copernicus Atmosphere Monitoring Service information.
	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
Chicago UVI	3	4	6	8	9	10	10	9	8	6	4	2
Brooklyn UVI	3	5	6	8	10	10	9	9	8	6	4	2
New York City UVI	3	5	6	8	10	10	9	9	8	6	4	2
Los Angeles UVI	4	6	8	9	10	11	11	10	10	7	5	4
Mesa	4	6	9	10	11	12	11	11	10	8	5	4
Houston UVI	5	8	9	11	11	12	12	11	10	9	7	5